" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
Verified answer
Pelajaran :MatematikaKelas :7
Bab :8
Nama Bab :Segitiga dan Segi Empat
Kode mapel:2
Kode :7.2.8
Jawab:
y=BC-DC
=20-10/2
=20-5
=15
AB=√3(10)
=10√3
x=√(10√3)²-15²
=√100.3-225
=√300-225
=√75
=5√3
pake rumus pytagoras
AB² + AC² = BC²
AB² + 10² = 20²
AB² = 300
AB = 10√3
Segitiga ABD
pake rumus pytagoras sudut 30°
AD : BD : AB = 1 : √3 : 2
AD : AB = 1 : 2
AD = ½ .10√3
AD = 5√3
BD : AB = √3 : 2
BD = (√3)/2 . 10√3
BD = 3.5 = 15
Jadi x = 5√3 dan y = 15